sorry, i still dont get this last bit. how does the expression become exp(4) when x goes to 0? doesn't the denominator of the expression on the right become 0 as x goes to 0? so how does the expression on the right become 2 as x goes to 0?

sorry, i still dont get this last bit. how does the expression become exp(4) when x goes to 0? doesn't the denominator of the expression on the right become 0 as x goes to 0? so how does the expression on the right become 2 as x goes to 0?